-58.78% is the change from 507 to 209
Calculation steps:
[( 209 - 507 ) ÷ 507] x 100 = -58.78%
Formula
Percentage change = [(209 - 507) / 507] x 100
Subtract the new number by the original number
209 - 507 = -298
-298 ÷ 507 = -0.5877712031558185
-0.5877712031558185 x 100 = -58.78%